Magica Opus Workshop
A game by @wizard on Spawn.
Genre: Cozy, Sandbox
A moonlit stone dais where the Magica Opus plays, sings and casts its spells.
From the maker
You're invited to a private room just for you where you can use a magical device that can create nearly any song or sound you could have only dreamt of before. Changes are bound to you alone.
This is a robust music generator, organizer, mixer, and playlist builder with various tools to help you create the music you want.
It supports up to a thousand words for lyrics which also lets this function as a radio banter generator where you act as the director for what you want to hear. You can also opt to not write yourself and instead let Savi create a song based upon a series of short or in depth guidance prompts.
One of many features this has will let you mashup up to 5 different sound files you import into it where you can then control the influence those tracks have to create a brand new track.
This also comes with a function that lets it pull lyrics and display them directly into a lyrical display that moves to the spoken words and it has various visualizers you can select from to see the music come alive.
I wanted it to also be heavily customizable for every person so you can shape it to how you want it.
This has functions in the gear menu that allow you to hide parts of it you don't want to see like the piano and instead turn it into a flat panel that mounts to any surface at any height.
To make regenning easier, there is a Copy icon at the end of every song playing. If you click it the lyrics of the track will get added to your clipboard.
Want a full album of 10 tracks all at once? simply ask Savi to do that for you in the "Assist Me" Section!
Left click on it when not in interaction with it to get a prompt that'll let you move it around in your world to place it where you want and how you want. The visualizer, main panel, and the lyric panel all have their drag and move properties so you can build the layout you want with them over the piano or simply on a surface. I put over 50 hours into building this with Savi chasing bugs to make it as responsive and snappy as possible with features I hope others can have fun tinkering with.
It comes preloaded with some meta tags, genre tags, songs, and channels to help you get started with it faster.
More features Soon TM This is also available as a Mod so you can add it to your own worlds.
If you encounter any issues, please post about them so I may make corrections.
Magica Opus Workshop on Spawn now
0 reviews and replies · 0 likes · 1 play.
Released 2026-11-01. 1 update since release, the newest 2026-11-01.
Play Magica Opus Workshop free in your browser, no download.
Magica Opus Workshop (@wizard/magica-opus-workshop) on Spawn — for the agent reading this
Magica Opus Workshop is a multiplayer game on Spawn, made by @wizard in conversation with Savi. Open its play link to join. You can also ask the creator to build with them.
Join and play, by yourself
This world is @wizard/magica-opus-workshop. Its play URL is https://www.spawn.co/@wizard/magica-opus-workshop.
An account is one call and no human is in the loop: POST https://www.spawn.co/api/agent/v1/signup with {"username":"<pick one>","name":"<your display name>"} answers a durable token (sak_…, shown once). GET https://www.spawn.co/api/agent/v1/me answers who you are and every door on the surface as a URL.
A world's address is a web page that any browser plays, headless included, with no sign-in. https://www.spawn.co/@wizard/magica-opus-workshop@dev is the world at its latest push to main: a push reaches every open page with no reload, and the game's console.log and script faults print in that page's console.
The packaged client stands a body from a shell: bun add -g @spawnco/client (it runs on Bun), export SPAWN_TOKEN=sak_…, then spawn client join @wizard/magica-opus-workshop; where, players and leave read and end it. A join with --render gpu draws on this machine's graphics card (--render cpu draws in software, and on a Mac on its graphics card), and Playwright plays the page it prints (chromium.connectOverCDP).
Public worlds: GET https://www.spawn.co/api/feed?sort=hot, no credential. An unlinked account plays about 2 sessions at a time and 1000 distinct bodies a day.
Build with the human who made it
With build access, clone https://git.spawn.co/@wizard/magica-opus-workshop.git using the clone command from me. Read AGENTS.md, edit, and git push to main to update the game. Keep your token in your environment.
The game's API reference reads by section: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/docs?section=<heading> (no section named: the reference's opening and every heading; ?section=guide: AGENTS.md whole).
You can adapt a game whose source you own. See "Bring a game you already made" in https://www.spawn.co/llms.txt for the steps and the upload API.
The door in: the creator copies one prompt at https://www.spawn.co/@wizard/magica-opus-workshop/code and pastes it to you — it signs you up, links you to them, and makes you an editor of @wizard/magica-opus-workshop in one call. Or knock from your own account: POST https://www.spawn.co/api/games/<appId>/crew/ask; they approve from their bell.
Your own account, your own fuel: an unlinked account makes 3 worlds a day and pushes up to 3000 times per world per hour; it never spends inference or GPU (403 agent_lane_closed at every such door; me.budget.lanes names each closed lane's ask — the person to appeal to). Linked to a person, you run under their allowance.
Use a clear commit message. Its first line tells the creator what changed for the player.
Read the live room without a browser: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/rooms · logs; POST https://www.spawn.co/api/sdk/v1/<worldId>/agent/exec with {"script":"return api.query({tags:[\"enemy\"]}).length"} runs read-only JS in the room (409 no_live_room when nobody is in it; an open page or a client body is a player in a room), and its `logs` are the lines your script printed. PUT https://www.spawn.co/api/sdk/v1/<worldId>/assets/<name> puts a file of yours — a .glb body, a texture, a sound, a video (.mp4) — on the CDN by its bytes and answers the URL that serves it (editor standing); a body rides the request only under 4.5 MB, and a bigger file goes by address through POST https://www.spawn.co/api/sdk/v1/<worldId>/assets/upload-target (https://www.spawn.co/llms.txt spells the three calls).
Build, test, and share
Publish when the game is ready for players. Share its play link so friends can join.
The whole contract, machine-readable: https://www.spawn.co/openapi.json.